1 IS EASY, 6 IS VERY EXPENSIVE - HOWEVER A LEVEL OR STAR RATING OF 3 & 4 IS REASONABLY EASY TO ACHIEVE (ALTHOUGH COSTLY)

CODE CALCULATIONS ARE DONE BY OURSELVES WITH INPUT BY OUR ASSOCIATE THERMAL ENGINEERS AND ARE SUBJECT TO CAREFUL SPECIFICATION OF SPACE & WATER HEATING, INSULATION, WATER SAVING AND AIR TIGHTNESS OF CONSTRUCTION, TOGETHER WITH A KNOWLEDGE OF THE SOURCE OF MATERIALS, MANAGEMENT OF THE BUILD SITE AND FUTURE USAGE BY THE OCCUPANTS